@article{10_1017_S0017089500031256,
     author = {R\u{a}dulescu, Vicen\c{t}iu D.},
     title = {Nontrivial solutions for a multivalued problem with strong resonance},
     journal = {Glasgow mathematical journal},
     pages = {53--59},
     year = {1996},
     volume = {38},
     number = {1},
     doi = {10.1017/S0017089500031256},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500031256/}
}